Pressure detection device of isostatic pressing machine

Abstract

The utility model discloses a pressure detection device for an isostatic press, which relates to the technical field of isostatic presses and comprises a connecting component and a testing component, the connecting component is arranged at the bottom of a working cylinder and communicated with the inside of the working cylinder, and the testing component is matched with the connecting component and used for testing the pressure inside the working cylinder; the testing assembly comprises a buffer overflow valve, a pressure gauge, a pressure sensor and a pressure release valve, one end of an inlet of the buffer overflow valve is connected with the connecting assembly through a conveying pipeline, and one end of an outlet of the buffer overflow valve is connected with one end of an inlet of the pressure release valve through a conveying pipeline; the pressure gauge and the pressure sensor are sequentially arranged on the conveying pipeline between the buffer overflow valve and the pressure release valve, so that the problem that the pressure gauge and the pressure sensor are influenced by instantaneous pressure and rebound after being quickly raised during actual testing of the pressure detection device of the isostatic pressing machine in the prior art is solved; therefore, the problem that the liquid pressure in the working cylinder cannot be stably and accurately detected is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of isostatic presses, in particular to a pressure detection device for an isostatic press. Background Art

[0002] Isostatic pressing refers to placing the workpiece to be processed in a processing mold with a specific shape, and then placing the processing mold with the workpiece to be processed in a working cylinder filled with liquid. The piston rod of the booster cylinder then mortgages the pressure head to allow the pressure head to enter the working cylinder, pressurize the liquid in the working cylinder, gradually pressurize the working chamber, and then transmit the pressure to the workpiece to be processed through the liquid, so that each surface of the workpiece to be processed is subjected to the same pressure and forms the required shape under the restriction of the mold.

[0003] When calculating the pressure of the liquid in the working cylinder, the existing isostatic press is generally calculated through the oil pressure and the cylinder diameter of the booster cylinder. However, when the isostatic press is working, the friction between the pressure head and the liquid in the working chamber will increase with the increase of the working pressure in the working cylinder. This leads to a large error between the calculated pressure of the liquid in the working cylinder and the actual pressure of the liquid.

[0004] In the utility model with application number: CN201820680905.1 and publication number: CN208060079U, a pressure detection device for an isostatic press is disclosed. Although the pressure gauge and the pressure sensor can detect the liquid pressure in the working cylinder, during actual testing, the pressure gauge and the pressure sensor will be affected by the instantaneous pressure, and there will be a phenomenon of rebound after rapid rise, which makes it impossible to stably and accurately detect the liquid pressure in the working cylinder, such as the impact of the booster cylinder. Utility Model Content

[0005] Based on this, in order to address the above problems, the utility model proposes an isostatic press pressure detection device, which solves the problem that during actual testing of the current isostatic press pressure detection device, the pressure gauge and pressure sensor will be affected by the instantaneous pressure, and will rebound after a rapid rise, thereby making it impossible to stably and accurately detect the liquid pressure in the working cylinder.

[0006] The technical solution of the utility model is:

[0007] A pressure detection device for an isostatic press comprises a connecting assembly and a testing assembly, wherein the connecting assembly is arranged at the bottom of a working cylinder and communicates with the inside of the working cylinder, and the testing assembly cooperates with the connecting assembly to test the pressure inside the working cylinder;

[0008] The test assembly includes a buffer overflow valve, a pressure gauge, a pressure sensor and a pressure relief valve, wherein an inlet end of the buffer overflow valve is connected to the connection assembly through a delivery pipeline, and an outlet end of the buffer overflow valve is connected to an inlet end of the pressure relief valve through a delivery pipeline;

[0009] The pressure gauge and the pressure sensor are arranged in sequence on the delivery pipeline between the buffer overflow valve and the pressure relief valve, and the pressure gauge is located on one side of the buffer overflow valve, and the pressure sensor is located on one side of the pressure relief valve.

[0010] Preferably, the working cylinder comprises a cylinder body, a heat-insulating layer and a bottom mounting seat, the heat-insulating layer is arranged on the top of the bottom mounting seat, and the cylinder body is arranged on the top of the heat-insulating layer.

[0011] Preferably, the cylinder body has a working cavity inside, and a bottom closing seat is provided at the bottom of the working cavity, and the bottom closing seat is used to close the bottom of the working cavity.

[0012] Preferably, the connecting assembly comprises a first connecting member, a second connecting member and a third connecting member, one end of the first connecting member is sealedly connected to one end of the second connecting member, and the other end of the second connecting member is sealedly connected to the third connecting member.

[0013] Preferably, the first connecting member includes a first sealing plug and a first sleeve, the first sealing plug is arranged in the working chamber, the bottom of the first sealing plug is matched with the top of the bottom closing seat, the first sleeve is arranged in the working chamber, and one end passes through the first sealing plug, and the other end passes through the bottom closing seat and the insulation layer, the first sleeve is fixedly connected to the bottom closing seat and the insulation layer, and a first test flow channel is provided in the first sleeve.

[0014] Preferably, step-shaped sealing limit positions are provided on both sides of the top of the bottom closing seat, and a matching limit position is provided at the bottom of the first sealing plug to cooperate with the sealing limit position. The matching limit position can contact with the sealing limit position to limit the first sealing plug, and the contact position between the sealing limit position and the matching limit position is provided with a first sealing ring and a second sealing ring for increasing the sealing performance.

[0015] Preferably, the second connecting member includes a second sealing plug and a second sleeve, one end of the second sleeve passes through the bottom mounting seat and is threadedly connected to the bottom mounting seat, the end of the second sleeve passing through one end of the bottom mounting seat is provided with a plug-in portion, the second sealing plug is arranged at the end of the plug-in portion, and the plug-in portion passes through the second sealing plug, the plug-in portion and the second sealing plug can be inserted into the first sleeve and plugged into the first sleeve, a second test flow channel is provided in the second sleeve and the plug-in portion, and the second test flow channel is arranged in coordination with the first test flow channel.

[0016] Preferably, the third connecting member includes a third sleeve and a tee joint, one end of the third sleeve can be inserted into the second sleeve and threadedly connected to the second sleeve, one end of the third sleeve inserted into the second sleeve is provided with an insertion portion, the insertion portion can be inserted into the second test channel, the other end of the third sleeve is connected to the tee joint, a third test channel is provided in the third sleeve and the insertion portion, and the third test channel is arranged in coordination with the second test channel.

[0017] Preferably, a first limit point cooperating with the plug-in portion and the second sealing plug is provided in the first sleeve, a second limit point cooperating with the third sleeve is provided in the second sleeve, a third sealing ring for increasing the sealing is provided between the third sleeve and the second limit point, and a fourth sealing ring for increasing the sealing is provided on the end of the third sleeve inserted into the second sleeve.

[0018] Preferably, one end of the inlet of the buffer overflow valve is connected to one end of the three-way joint through a delivery pipeline, and the other end of the three-way joint is connected to an emergency relief valve through the delivery pipeline.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] When the utility model is in use, the working cylinder is used to play a certain role in energy storage and buffering, and then the test assembly is connected to the working cylinder through the connecting assembly, so that the test assembly can be led out separately, which is conducive to stably and accurately checking the liquid pressure in the working cylinder. By arranging a buffer overflow valve before the pressure gauge and the pressure sensor, the instantaneous pressure generated when the isostatic press is working is diluted, so as to reduce the phenomenon that the pressure gauge and the pressure sensor rebound after being rapidly increased after being subjected to the instantaneous pressure, which is conducive to stably and accurately detecting the liquid pressure in the working cylinder and extending the service life of the equipment. It solves the problem that in the current isostatic press pressure detection device, the pressure gauge and the pressure sensor will be affected by the instantaneous pressure during actual testing, and the phenomenon of rapid increase and rebound will occur, resulting in the inability to stably and accurately detect the liquid pressure in the working cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic cross-sectional structure diagram of an isostatic press pressure detection device described in an embodiment of the utility model;

[0022] Figure 2 It is described in the embodiment of the utility model Figure 1 A schematic diagram of the cross-section enlarged structure of the center circle;

[0023] Figure 3 It is described in the embodiment of the utility model Figure 2 A schematic diagram of the cross-section enlarged structure of the center circle;

[0024] Description of reference numerals:

[0025] 10-connection assembly, 11-first connection piece, 12-second connection piece, 13-third connection piece, 100-first sealing plug, 101-first sleeve, 102-first test flow channel, 103-matching limit, 104-first sealing ring, 105-second sealing ring, 106-second sealing plug, 107-second sleeve, 108-plug-in part, 109-second test flow channel, 110-third sleeve, 111-tee joint, 112-insertion part, 113 -the third test flow channel, 114-the first limit, 115-the second limit, 116-the third sealing ring, 117-the fourth sealing ring, 118-the emergency relief valve, 20-the test assembly, 200-the buffer overflow valve, 201-the pressure gauge, 202-the pressure sensor, 203-the pressure relief valve, 30-the working cylinder, 300-the cylinder body, 301-the insulation layer, 302-the bottom mounting seat, 303-the working chamber, 304-the bottom closing seat, 305-the sealing limit. DETAILED DESCRIPTION

[0026] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0027] Example:

[0028] like Figure 1 As shown, in order to solve the above problems, this embodiment discloses an isostatic press pressure detection device, including a connecting assembly 10 and a testing assembly 20, wherein the connecting assembly 10 is arranged at the bottom of a working cylinder 30 and communicates with the inside of the working cylinder 30, and the testing assembly 20 cooperates with the connecting assembly 10 to test the pressure inside the working cylinder 30;

[0029] The test assembly 20 includes a buffer overflow valve 200, a pressure gauge 201, a pressure sensor 202 and a pressure relief valve 203. An inlet end of the buffer overflow valve 200 is connected to the connection assembly 10 through a delivery pipeline, and an outlet end of the buffer overflow valve 200 is connected to an inlet end of the pressure relief valve 203 through a delivery pipeline.

[0030] The pressure gauge 201 and the pressure sensor 202 are sequentially arranged on the delivery pipeline between the buffer overflow valve 200 and the pressure relief valve 203 , and the pressure gauge 201 is located on one side of the buffer overflow valve 200 , and the pressure sensor 202 is located on one side of the pressure relief valve 203 .

[0031] When the utility model is in use, the working cylinder 30 is used to play a certain role in energy storage and buffering, and then the test assembly 20 is connected to the working cylinder 30 through the connecting assembly 10, so that the test assembly 20 can be led out separately, which is conducive to stably and accurately checking the liquid pressure in the working cylinder 30. By setting a buffer overflow valve 200 before the pressure gauge 201 and the pressure sensor 202, the instantaneous pressure generated when the isostatic press is working is diluted, so as to reduce the phenomenon that the pressure gauge 201 and the pressure sensor 202 rebound after being rapidly increased after being subjected to the instantaneous pressure, which is conducive to stably and accurately detecting the liquid pressure in the working cylinder 30 and extending the service life of the equipment. It solves the problem that the pressure gauge 201 and the pressure sensor 202 of the current isostatic press pressure detection device are affected by the instantaneous pressure during actual testing, and the phenomenon of rapid increase and rebound occurs, thereby causing the inability to stably and accurately detect the liquid pressure in the working cylinder 30.

[0032] The pressure gauge 201 can adopt a pressure gauge 201 in the prior art that can realize the function of the utility model, the pressure sensor 202 can adopt a pressure sensor 202 in the prior art that can realize the function of the utility model, the buffer overflow valve 200 can adopt an overflow valve in the prior art that can realize the function of the utility model, and the pressure relief valve 203 can adopt a pressure relief valve 203 in the prior art that can realize the function of the utility model.

[0033] Preferably, the working cylinder 30 includes a cylinder body 300 , a heat-insulating layer 301 and a bottom mounting seat 302 , the heat-insulating layer 301 is arranged on the top of the bottom mounting seat 302 , and the cylinder body 300 is arranged on the top of the heat-insulating layer 301 .

[0034] The thermal insulation layer 301 is a thermal insulation board in the prior art.

[0035] Preferably, the cylinder body 300 has a working cavity 303 inside, and a bottom closing seat 304 is provided at the bottom of the working cavity 303 , and the bottom closing seat 304 is used to close the bottom of the working cavity 303 .

[0036] In order to make the connection component 10 have better sealing performance, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the connection component 10 includes a first connection member 11, a second connection member 12 and a third connection member 13, one end of the first connection member 11 is sealedly connected to one end of the second connection member 12, and the other end of the second connection member 12 is sealedly connected to the third connection member 13.

[0037] like Figure 2As shown, in order to make the connection assembly 10 have better sealing performance, this embodiment is modified on the basis of the above embodiment, and the difference from the above embodiment is that the first connection member 11 includes a first sealing plug 100 and a first sleeve 101, the first sealing plug 100 is arranged in the working cavity 303, the bottom of the first sealing plug 100 is matched with the top of the bottom closing seat 304, the first sleeve 101 is arranged in the working cavity 303, and one end passes through the first sealing plug 100, and the other end passes through the bottom closing seat 304 and the insulation layer 301, the first sleeve 101 is fixedly connected to the bottom closing seat 304 and the insulation layer 301, and a first test flow channel 102 is arranged in the first sleeve 101.

[0038] Preferably, stepped sealing limit points 305 are provided on both sides of the top of the bottom closing seat 304, and a matching limit point 103 which is matched with the sealing limit point 305 is provided at the bottom of the first sealing plug 100. The matching limit point 103 can contact with the sealing limit point 305 to limit the first sealing plug 100, and the contact position between the sealing limit point 305 and the matching limit point 103 is provided with a first sealing ring 104 and a second sealing ring 105 for increasing the sealing performance.

[0039] When in use, the matching setting of the matching limiter 103 and the sealing limiter 305 allows the first sealing plug 100 to be limited after contacting the bottom sealing seat 304. At the same time, the first sealing ring 104 and the second sealing ring 105 are arranged at the contact position of the sealing limiter 305 and the matching limiter 103, which can effectively increase the sealing performance, thereby preventing the liquid in the working cylinder 30 from flowing out from the connection between the first sleeve 101, the bottom sealing seat 304 and the insulation layer 301. The first test flow channel 102 is used to lead out the liquid in the working cylinder 30.

[0040] like Figure 3 As shown, preferably, the second connecting member 12 includes a second sealing plug 106 and a second sleeve 107, one end of the second sleeve 107 passes through the bottom mounting seat 302 and is threadedly connected to the bottom mounting seat 302, the end of the second sleeve 107 passing through one end of the bottom mounting seat 302 is provided with a plug-in portion 108, the second sealing plug 106 is arranged at the end of the plug-in portion 108, and the plug-in portion 108 passes through the second sealing plug 106, the plug-in portion 108 and the second sealing plug 106 can be inserted into the first sleeve 101 and plugged with the first sleeve 101, a second test channel 109 is provided in the second sleeve 107 and the plug-in portion 108, and the second test channel 109 is arranged in coordination with the first test channel 102.

[0041] When in use, the plug-in portion 108 and the second sealing plug 106 at one end of the second sleeve 107 are inserted into the first sleeve 101 and plugged with the first sleeve 101, and a second test channel 109 is provided in cooperation with the first test channel 102 to draw out the liquid in the first test channel 102. The provision of the second sealing plug 106 can make the connection between the first sleeve 101 and the second sleeve 107 have better sealing. One end of the second sleeve 107 passes through the bottom mounting seat 302 and is threadedly connected to the bottom mounting seat 302, which can facilitate the installation of the second sleeve 107. At the same time, sealant is added during the threaded connection to further increase the sealing.

[0042] like Figure 2 , Figure 3 As shown, preferably, the third connecting member 13 includes a third sleeve 110 and a three-way joint 111, one end of the third sleeve 110 can be inserted into the second sleeve 107 and threadedly connected to the second sleeve 107, one end of the third sleeve 110 inserted into the second sleeve 107 is provided with an insertion portion 112, the insertion portion 112 can be inserted into the second test channel 109, the other end of the third sleeve 110 is connected to the three-way joint 111, the third sleeve 110 and the insertion portion 112 are provided with a third test channel 113, and the third test channel 113 is arranged in coordination with the second test channel 109.

[0043] When in use, one end of the third sleeve 110 is screwed into the second sleeve 107, and the insertion portion 112 at one end of the third sleeve 110 is inserted into the second test flow channel 109, so that the third sleeve 110 is better connected to the second sleeve 107. At the same time, a third test flow channel 113 is provided in coordination with the second test flow channel 109 to draw out the liquid in the second test flow channel 109. One end of the third sleeve 110 is threadedly connected to the second sleeve 107, which can facilitate the installation of the third sleeve 110. At the same time, sealant is added during the threaded connection to further increase the sealing. The other end of the third sleeve 110 is connected to the three-way joint 111, which can facilitate the access to the test assembly 20.

[0044] Preferably, a first limit point 114 is provided in the first sleeve 101 to cooperate with the plug-in portion 108 and the second sealing plug 106 . The provision of the first limit point 114 can effectively prevent the second sleeve 107 from being over-inserted.

[0045] Preferably, a second limit point 115 is provided in the second sleeve 107 to cooperate with the third sleeve 110 . The provision of the second limit point 115 can effectively prevent the third sleeve 110 from being over-inserted.

[0046] Preferably, a third sealing ring 116 for increasing sealing is provided between the third sleeve 110 and the second limit position 115, and a fourth sealing ring 117 for increasing sealing is provided on one end of the third sleeve 110 inserted into the second sleeve 107. The provision of the third sealing ring 116 and the fourth sealing ring 117 can make the connection between the third sleeve 110 and the second sleeve 107 have better sealing.

[0047] In order to enable the utility model to have the function of emergency pressure relief, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that one end of the inlet of the buffer overflow valve 200 is connected to one end of the three-way joint 111 through a delivery pipe, and the other end of the three-way joint 111 is connected to the emergency relief valve 118 through a delivery pipe.

[0048] When in use, when a sudden pressure increase occurs, the emergency relief valve 118 can be used to quickly release the pressure.

[0049] The emergency relief valve 118 can be an emergency relief valve in the prior art that can realize the function of the utility model.

[0050] The utility model not only solves the problem that the pressure sensor 202 of the current isostatic press pressure detection device is affected by the instantaneous pressure during actual testing, resulting in a phenomenon of rapid rise and then rebound, thereby making it impossible to stably and accurately detect the liquid pressure in the working cylinder 30, but also solves the current problem that the liquid pressure in the working cylinder 30 of the isostatic press cannot be effectively detected.

[0051] Working principle of this utility model:

[0052] When the utility model is in use, the working cylinder 30 is used to play a certain role in energy storage and buffering, and then the test assembly 20 is connected to the working cylinder 30 through the connecting assembly 10, so that the test assembly 20 can be led out separately, which is conducive to stably and accurately checking the liquid pressure in the working cylinder 30. By arranging the buffer overflow valve 200 before the pressure gauge 201 and the pressure sensor 202, the instantaneous pressure generated by the isostatic press during operation is diluted, so as to reduce the phenomenon that the pressure gauge 201 and the pressure sensor 202 rebound after being rapidly increased after being subjected to the instantaneous pressure, which is conducive to stably and accurately detecting the liquid pressure in the working cylinder 30 and extending the service life of the equipment.

[0053] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. An isostatic press pressure detection device, characterized in that: The invention comprises a connecting assembly (10) and a testing assembly (20), wherein the connecting assembly (10) is arranged at the bottom of a working cylinder (30) and is in communication with the interior of the working cylinder (30), and the testing assembly (20) cooperates with the connecting assembly (10) to test the pressure inside the working cylinder (30); The test assembly (20) comprises a buffer overflow valve (200), a pressure gauge (201), a pressure sensor (202) and a pressure relief valve (203); an inlet end of the buffer overflow valve (200) is connected to the connection assembly (10) via a delivery pipeline, and an outlet end of the buffer overflow valve (200) is connected to an inlet end of the pressure relief valve (203) via a delivery pipeline; The pressure gauge (201) and the pressure sensor (202) are sequentially arranged on the delivery pipeline between the buffer overflow valve (200) and the pressure relief valve (203), and the pressure gauge (201) is located on one side of the buffer overflow valve (200), and the pressure sensor (202) is located on one side of the pressure relief valve (203).

2. The isostatic press pressure detection device according to claim 1, characterized in that: The working cylinder (30) comprises a cylinder body (300), a heat-insulating layer (301) and a bottom mounting seat (302); the heat-insulating layer (301) is arranged on the top of the bottom mounting seat (302), and the cylinder body (300) is arranged on the top of the heat-insulating layer (301).

3. The isostatic press pressure detection device according to claim 2, characterized in that: The cylinder body (300) has a working cavity (303) inside, and a bottom closing seat (304) is provided at the bottom of the working cavity (303). The bottom closing seat (304) is used to close the bottom of the working cavity (303).

4. The isostatic press pressure detection device according to claim 3, characterized in that: The connection assembly (10) comprises a first connection member (11), a second connection member (12) and a third connection member (13); one end of the first connection member (11) is sealedly connected to one end of the second connection member (12), and the other end of the second connection member (12) is sealedly connected to the third connection member (13).

5. The isostatic press pressure detection device according to claim 4, characterized in that: The first connecting member (11) comprises a first sealing plug (100) and a first sleeve (101). The first sealing plug (100) is arranged in the working cavity (303). The bottom of the first sealing plug (100) is matched with the top of the bottom closing seat (304). The first sleeve (101) is arranged in the working cavity (303), and one end of the first sleeve passes through the first sealing plug (100), and the other end passes through the bottom closing seat (304) and the thermal insulation layer (301). The first sleeve (101) is fixedly connected to the bottom closing seat (304) and the thermal insulation layer (301), and a first test flow channel (102) is arranged in the first sleeve (101).

6. The isostatic press pressure detection device according to claim 5, characterized in that: The bottom closing seat (304) is provided with stepped sealing limit points (305) on both sides of the top, and the first sealing plug (100) is provided with a matching limit point (103) at the bottom thereof, which is matched with the sealing limit point (305). The matching limit point (103) can contact with the sealing limit point (305) to limit the first sealing plug (100), and the contact position between the sealing limit point (305) and the matching limit point (103) is provided with a first sealing ring (104) and a second sealing ring (105) for increasing the sealing performance.

7. The isostatic press pressure detection device according to claim 6, characterized in that: The second connecting member (12) comprises a second sealing plug (106) and a second sleeve (107); one end of the second sleeve (107) passes through the bottom mounting seat (302) and is threadedly connected to the bottom mounting seat (302); an end portion of the second sleeve (107) passing through one end of the bottom mounting seat (302) is provided with a plug-in portion (108); the second sealing plug (106) is arranged at the end portion of the plug-in portion (108), and the plug-in portion (108) passes through the second sealing plug (106); the plug-in portion (108) and the second sealing plug (106) can be inserted into the first sleeve (101) and plugged with the first sleeve (101); a second test flow channel (109) is provided in the second sleeve (107) and the plug-in portion (108); the second test flow channel (109) is arranged in coordination with the first test flow channel (102).

8. The isostatic press pressure detection device according to claim 7, characterized in that: The third connecting member (13) comprises a third sleeve (110) and a three-way joint (111); one end of the third sleeve (110) can be inserted into the second sleeve (107) and is threadedly connected to the second sleeve (107); one end of the third sleeve (110) inserted into the second sleeve (107) is provided with an insertion portion (112); the insertion portion (112) can be inserted into the second test flow channel (109); the other end of the third sleeve (110) is connected to the three-way joint (111); a third test flow channel (113) is provided in the third sleeve (110) and the insertion portion (112); the third test flow channel (113) is arranged in coordination with the second test flow channel (109).

9. The isostatic press pressure detection device according to claim 8, characterized in that: A first limit position (114) is provided in the first sleeve (101) and is arranged in cooperation with the plug-in portion (108) and the second sealing plug (106); a second limit position (115) is provided in the second sleeve (107) and is arranged in cooperation with the third sleeve (110); a third sealing ring (116) is provided between the third sleeve (110) and the second limit position (115) for increasing the sealing performance; and a fourth sealing ring (117) is provided on one end of the third sleeve (110) inserted into the second sleeve (107) for increasing the sealing performance.

10. The isostatic press pressure detection device according to claim 9, characterized in that: One end of the inlet of the buffer overflow valve (200) is connected to one end of the three-way joint (111) through a delivery pipeline, and the other end of the three-way joint (111) is connected to an emergency discharge valve (118) through a delivery pipeline.

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